Remove bindgen tool from build phase of Dockerfiles

See:

- artichoke/artichoke#2514

README.md

@@ -51,8 +51,6 @@ Currently supported docker platforms are:
 - `ARTICHOKE_NIGHTLY_VER` - Argument used for cache invalidation (see
   `Dockerfile`), defaults to SHA of latest trunk commit in upstream Artichoke
   repository.
-- `BINDGEN_PACKAGE` - Rust bindgen package (for cargo install).
-- `BINDGEN_VERSION` - Rust bindgen version.
 
 [artichoke-repo]: https://github.com/artichoke/artichoke
 [docker-hub]: https://hub.docker.com/r/artichokeruby/artichoke

alpine/Dockerfile

@@ -63,14 +63,6 @@ ENV CARGO_NET_GIT_FETCH_WITH_CLI=true
 # https://doc.rust-lang.org/cargo/reference/config.html#registriescrates-ioprotocol
 ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
 
-# Install bindgen
-ARG BINDGEN_PACKAGE=bindgen-cli
-ARG BINDGEN_VERSION=0.65.1
-RUN set -eux; \
-    rustup component add rustfmt; \
-    cargo install --version $BINDGEN_VERSION --locked $BINDGEN_PACKAGE; \
-    bindgen --version
-
 ARG TARGETPLATFORM
 ARG TARGETARCH
 ARG TARGETVARIANT

debian/bullseye/slim/Dockerfile

@@ -64,14 +64,6 @@ ENV CARGO_NET_GIT_FETCH_WITH_CLI=true
 # https://doc.rust-lang.org/cargo/reference/config.html#registriescrates-ioprotocol
 ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
 
-# Install bindgen
-ARG BINDGEN_PACKAGE=bindgen-cli
-ARG BINDGEN_VERSION=0.65.1
-RUN set -eux; \
-    rustup component add rustfmt; \
-    cargo install --version $BINDGEN_VERSION --locked $BINDGEN_PACKAGE; \
-    bindgen --version
-
 ARG TARGETPLATFORM
 ARG TARGETARCH
 ARG TARGETVARIANT
@@ -85,11 +77,6 @@ ARG TARGETVARIANT
 ARG ARTICHOKE_NIGHTLY_VER=latest
 # Install artichoke
 RUN set -eux; \
-    case "${TARGETARCH}" in \
-        amd64) artichokeArch='x86_64-unknown-linux-gnu' ;; \
-        arm64) artichokeArch='aarch64-unknown-linux-gnu'; export BINDGEN_EXTRA_CLANG_ARGS='--sysroot=/usr/aarch64-linux-gnu' ;; \
-        *) echo >&2 "unsupported architecture: ${TARGETARCH}"; exit 1 ;; \
-    esac; \
     if [ "$ARTICHOKE_NIGHTLY_VER" = "latest" ]; then \
       cargo install \
         --target "$artichokeArch" \

ubuntu/jammy/Dockerfile

@@ -66,14 +66,6 @@ ENV CARGO_NET_GIT_FETCH_WITH_CLI=true
 # https://doc.rust-lang.org/cargo/reference/config.html#registriescrates-ioprotocol
 ENV CARGO_REGISTRIES_CRATES_IO_PROTOCOL=sparse
 
-# Install bindgen
-ARG BINDGEN_PACKAGE=bindgen-cli
-ARG BINDGEN_VERSION=0.65.1
-RUN set -eux; \
-    rustup component add rustfmt; \
-    cargo install --version $BINDGEN_VERSION --locked $BINDGEN_PACKAGE; \
-    bindgen --version
-
 ARG TARGETPLATFORM
 ARG TARGETARCH
 ARG TARGETVARIANT
@@ -87,11 +79,6 @@ ARG TARGETVARIANT
 ARG ARTICHOKE_NIGHTLY_VER=latest
 # Install artichoke
 RUN set -eux; \
-    case "${TARGETARCH}" in \
-        amd64) artichokeArch='x86_64-unknown-linux-gnu' ;; \
-        arm64) artichokeArch='aarch64-unknown-linux-gnu'; export BINDGEN_EXTRA_CLANG_ARGS='--sysroot=/usr/aarch64-linux-gnu' ;; \
-        *) echo >&2 "unsupported architecture: ${TARGETARCH}"; exit 1 ;; \
-    esac; \
     if [ "$ARTICHOKE_NIGHTLY_VER" = "latest" ]; then \
       cargo install \
         --target "$artichokeArch" \